#region Copyright (c) 2006-2012 nHydrate.org, All Rights Reserved
//--------------------------------------------------------------------- *
//                          NHYDRATE.ORG                                *
//             Copyright (c) 2006-2012 All Rights reserved              *
//                                                                      *
//                                                                      *
//This file and its contents are protected by United States and         *
//International copyright laws.  Unauthorized reproduction and/or       *
//distribution of all or any portion of the code contained herein       *
//is strictly prohibited and will result in severe civil and criminal   *
//penalties.  Any violations of this copyright will be prosecuted       *
//to the fullest extent possible under law.                             *
//                                                                      *
//THE SOURCE CODE CONTAINED HEREIN AND IN RELATED FILES IS PROVIDED     *
//TO THE REGISTERED DEVELOPER FOR THE PURPOSES OF EDUCATION AND         *
//TROUBLESHOOTING. UNDER NO CIRCUMSTANCES MAY ANY PORTION OF THE SOURCE *
//CODE BE DISTRIBUTED, DISCLOSED OR OTHERWISE MADE AVAILABLE TO ANY     *
//THIRD PARTY WITHOUT THE EXPRESS WRITTEN CONSENT OF THE NHYDRATE GROUP *
//                                                                      *
//UNDER NO CIRCUMSTANCES MAY THE SOURCE CODE BE USED IN WHOLE OR IN     *
//PART, AS THE BASIS FOR CREATING A PRODUCT THAT PROVIDES THE SAME, OR  *
//SUBSTANTIALLY THE SAME, FUNCTIONALITY AS THIS PRODUCT                 *
//                                                                      *
//THE REGISTERED DEVELOPER ACKNOWLEDGES THAT THIS SOURCE CODE           *
//CONTAINS VALUABLE AND PROPRIETARY TRADE SECRETS OF NHYDRATE,          *
//THE REGISTERED DEVELOPER AGREES TO EXPEND EVERY EFFORT TO             *
//INSURE ITS CONFIDENTIALITY.                                           *
//                                                                      *
//THE END USER LICENSE AGREEMENT (EULA) ACCOMPANYING THE PRODUCT        *
//PERMITS THE REGISTERED DEVELOPER TO REDISTRIBUTE THE PRODUCT IN       *
//EXECUTABLE FORM ONLY IN SUPPORT OF APPLICATIONS WRITTEN USING         *
//THE PRODUCT.  IT DOES NOT PROVIDE ANY RIGHTS REGARDING THE            *
//SOURCE CODE CONTAINED HEREIN.                                         *
//                                                                      *
//THIS COPYRIGHT NOTICE MAY NOT BE REMOVED FROM THIS FILE.              *
//--------------------------------------------------------------------- *
#endregion

using System;

namespace nHydrate.Generator.Common.Util
{
	internal abstract class CryptographyHelperBase : ICryptoHelper
	{
				
		#region ICryptoHelper Members

												public abstract byte[] Encrypt(byte[] plaintext);

														public string Encrypt( string plaintext, StringEncodingType encoding )
		{
			var bytesIn = ByteEncoding.StringToBytes(plaintext);
			var encryptedBytes = Encrypt(bytesIn);
			string returnValue = null;
			switch(encoding)
			{
				case StringEncodingType.Base64:
					returnValue = ByteEncoding.BytesToBase64(encryptedBytes);
					break;
				case StringEncodingType.Hex:
					returnValue = ByteEncoding.BytesToHex(encryptedBytes);
					break;
				default:
					throw new ArgumentException("Unknown encoding type.");
			}
			Array.Clear(bytesIn, 0, bytesIn.Length);
			Array.Clear(encryptedBytes, 0, encryptedBytes.Length);
			return returnValue;
		}

												public string Encrypt( string plaintext)
		{
			return Encrypt(plaintext, StringEncodingType.Base64);
		}


												public abstract byte[] Decrypt(byte[] cipherText);
		

														public string Decrypt( string cipherText, StringEncodingType encoding )
		{
			byte[] bytesIn = null;
			switch(encoding)
			{
				case StringEncodingType.Base64:
					bytesIn = ByteEncoding.Base64ToBytes(cipherText);
					break;
				case StringEncodingType.Hex:
					bytesIn = ByteEncoding.HexToBytes(cipherText);
					break;
				default:
					throw new ArgumentException("Unknown encoding type.");
			}
			var bytesOut = Decrypt(bytesIn);
			var returnValue = ByteEncoding.BytesToString(bytesOut);
			Array.Clear(bytesIn, 0, bytesIn.Length);
			Array.Clear(bytesOut, 0, bytesOut.Length);
			return returnValue;
		}

												public string Decrypt( string cipherText)
		{
			return Decrypt(cipherText, StringEncodingType.Base64);
		}


		#endregion

		#region IDisposable Members

		public abstract void Dispose();

		#endregion

		#region ICryptoHelper Properties

		public abstract string Entropy
		{
			get;
			set;
		}

		public abstract CryptographyAlgorithm Algorithm
		{
			get;
		}

		#endregion
	}
}
